Exception in thread 'Main'

Question

Exception in thread 'Main'

Rohit-Metapercept opened this issue 7 years ago · 8 comments

Hi Sir ,
I am having an exception error when running the program

Exception in thread "main" jlibs.core.lang.ImpossibleException: java.lang.ClassCastException: org.apache.xerces.dom.DOMXSImplementationSourceImpl cannot be cast to org.w3c.dom.DOMImplementationSource
at jlibs.xml.xsd.XSParser.(XSParser.java:53)
at jlibs.xml.xsd.XSParser.(XSParser.java:44)
at csvconverter.xsdconv.main(xsdconv.java:17)
Caused by: java.lang.ClassCastException: org.apache.xerces.dom.DOMXSImplementationSourceImpl cannot be cast to org.w3c.dom.DOMImplementationSource
at org.w3c.dom.bootstrap.DOMImplementationRegistry.newInstance(DOMImplementationRegistry.java:187)
at jlibs.xml.xsd.XSParser.(XSParser.java:51)
... 2 more

Please suggest me where I am going wrong.

This is the java code:-

package csvconverter;
import jlibs.xml.xsd.XSParser;

import javax.xml.namespace.QName;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.stream.StreamResult;

import org.apache.xerces.xs.*;
import jlibs.xml.xsd.XSInstance;
import jlibs.xml.sax.XMLDocument;

public class xsdconv {

	@SuppressWarnings("unused")
	public static void main (String[] args){
	
		XSModel xsModel = new XSParser().parse("C:\\Users\\Admin\\Desktop\\out.xsd");
		XSInstance xsInstance = new XSInstance();
		xsInstance.minimumElementsGenerated = 2;
		xsInstance.maximumElementsGenerated = 4;
		xsInstance.generateOptionalElements = Boolean.TRUE; // null means random
		
		
		QName rootElement = new QName("http://jlibs.org", "PurchaseOrder");
		XMLDocument sampleXml = null;
		try {
			sampleXml = new XMLDocument(new StreamResult(System.out), true, 4, null);
		} catch (TransformerConfigurationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		
		xsInstance.generate(xsModel, rootElement, sampleXml);
	}
}

Answer 1 · 2017-06-29T07:54:06.000Z

seems you are not using maven.

you should have following in your classpath:
http://central.maven.org/maven2/xerces/xercesImpl/2.11.0/xercesImpl-2.11.0.jar
http://central.maven.org/maven2/xml-apis/xml-apis/1.4.01/xml-apis-1.4.01.jar

Answer 2 · 2017-06-29T09:20:52.000Z

I had imported those jar files , still I am facing the same error. And how to do it from command prompt . I am unable to understand that also.

Answer 3 · 2017-06-29T10:30:24.000Z

I tried the following with java version "1.7.0_80". and it works fine

curl -O http://central.maven.org/maven2/in/jlibs/jlibs-xsd/2.2.1/jlibs-xsd-2.2.1.jar
curl -O http://central.maven.org/maven2/in/jlibs/jlibs-xml/2.2.1/jlibs-xml-2.2.1.jar
curl -O http://central.maven.org/maven2/in/jlibs/jlibs-core/2.2.1/jlibs-core-2.2.1.jar
curl -O http://central.maven.org/maven2/in/jlibs/jlibs-visitor/2.2.1/jlibs-visitor-2.2.1.jar
curl -O http://central.maven.org/maven2/xerces/xercesImpl/2.11.0/xercesImpl-2.11.0.jar
curl -O http://central.maven.org/maven2/xml-apis/xml-apis/1.4.01/xml-apis-1.4.01.jar
mkdir classes
javac -d classes -classpath jlibs-core-2.2.1.jar:jlibs-visitor-2.2.1.jar:jlibs-xml-2.2.1.jar:jlibs-xsd-2.2.1.jar:xercesImpl-2.11.0.jar:xml-apis-1.4.01.jar xsdconv.java
java -classpath classes:jlibs-core-2.2.1.jar:jlibs-visitor-2.2.1.jar:jlibs-xml-2.2.1.jar:jlibs-xsd-2.2.1.jar:xercesImpl-2.11.0.jar:xml-apis-1.4.01.jar csvconverter.xsdconv

Answer 4 · 2017-06-29T10:39:14.000Z

This is my code java code:

package csvconverter;

import javax.xml.namespace.QName;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.stream.StreamResult;

import org.apache.xerces.xs.XSModel;

import jlibs.xml.sax.XMLDocument;
import jlibs.xml.xsd.XSInstance;

public class xsdconv {


	public static void main (String[] args) throws TransformerConfigurationException{
	
		xsdconv xsModel = new xsdconv().parse("C:\\Users\\Admin\\Desktop\\out.xsd");
		
		XSInstance xsInstance = new XSInstance();

		xsInstance.minimumElementsGenerated = 2;

		xsInstance.maximumElementsGenerated = 4;

		xsInstance.generateOptionalElements = Boolean.TRUE; 
		
		QName rootElement = new QName("", "out");

		XMLDocument sampleXml = new XMLDocument(new StreamResult(System.out), true, 4, null);

		xsInstance.generate((XSModel) xsModel, rootElement, sampleXml);
		
	}

	private xsdconv parse(String string) {
		// TODO Auto-generated method stub
		return null;
	}
}

and now the exception is this
Exception in thread "main" java.lang.NullPointerException
at jlibs.xml.xsd.XSInstance.generate(XSInstance.java:98)
at jlibs.xml.xsd.XSInstance.generate(XSInstance.java:93)
at csvconverter.xsdconv.main(xsdconv.java:31)

Answer 5 · 2017-06-29T10:59:18.000Z

the method parse(string) is returning null.

Answer 6 · 2017-06-29T14:18:31.000Z

I think the syntax is correct. Then why it is so ?

Answer 7 · 2020-09-04T09:10:19.000Z

i am facing the same issue

Answer 8 · 2020-09-04T09:10:47.000Z

Caused by: java.lang.ClassCastException: org.apache.xerces.dom.DOMXSImplementationSourceImpl cannot be cast to org.w3c.dom.DOMImplementationSource
at org.w3c.dom.bootstrap.DOMImplementationRegistry.newInstance(DOMImplementationRegistry.java:187)
at org.fit.pdfdom.PDFDomTree.writeText(PDFDomTree.java:188)
... 2 mo